I find this extension fantastic to use. I have played around with multiple shopping carts but have nevered tried offering digital media for sale before. I have installed Virtumart on a few occasions and was dreading the MAJOR install for such a small thing (offering a few digital products).
I also like the integration with Paypal. I wasn't able to get the sandbox testing working but that was an issue with Paypal and not Mediashop. The paypal setup was quick and painless for the live account.
It's not to say that this is a perfect, unpack from the box and put it in Joomla, but if you are willing to explore a little and read the excellent documentation then you should be very satisfied.
I would recommend this extension to anyone that is looking for an easy solution for selling digital media that offers some controls like limited downloads for a limited time.
The only reason that I did not give it a full 5 Star rating is because I would like to not have to log into an FTP to upload the files. I know that there are extensions available for Joomla but it would make it much easier if you could do that from within the component.
Good job, keep up the good work!